Detectometer.



A. G. CARLSON. DETECTQMETER. APPLICATION EILED JUNE. 1913.

Patented Oct. 5, 1915.

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UNITED STATES PATENT ornion ARTHUR Gr. CARLSON, OF NORTH EASTON, MASSACHUSETTS.

DETECTOMETER.

Specification of Letters Patent.

Patented Get. 5, 1915.

Application filed June 11,1913. Serial No. 772,355.

To all whom it may concern Be it known that I, ARTHUR G. CARLsoN, of North Easton, in the county of Bristol and State of Massachusetts, have invented the new and useful Detectometer, of which the following is a specification.

In certain of the electrical arts and more especially in what areknown as wireless systerns, it becomes highly desirable at times to rapidly establish or reestablish definite conditions of pressure and engagement or re lationship between two elements such, for

' example, as contacts; and it is one of the principal objects of the present invention to provide'means whereby an exceedingly delicate adjusting tof elements ofthis description may be made in substantially a minimum time and withlittle effort or attention.

In wireless telegraphy, for example, it is known to use two contact elements one of which, is, in certain systems, a mineral cup and the other a pin the point of, which bears upon the'surface of the mineral in the cup. In such systems it has been found in practice that for an engagement of the pin point with a particular mineraland at a determined point upon said mineral, one pressure and butsubstantially only one pressure exerted by the pin point or its equivalent,

against the mineral is best adapted forthe reception of messages from a determmed distance under determined light and other wave afiectin'g conditions, and from a transmitter aflording'impulses of a determined wave length and strength. Frequently heretofore, an operative has been obliged to ascertain this particular contact condition by repeated trials, which-sometimes consumes as muchas'fifteen minutes time; and when from a slight jar or forany other cause, the requisite contact condition is disestablished, he is then obliged to repeat his trials to reestablish the sanie' In the case of a shipwreck, for example, such loss of time might prove fatal.

,My invention when applied to wireless telegraph apparatus substantially obviates this serious difliculty and'when once, the desired contact condition has been ascertained,

even though it may be. repeatedly lost by jars or'from other cause, it may be as repeatedly reestablished, immediately and with ease.

In the accompanying drawing Ir h x3: emplified a preferred construction b d ing my invention, but as I am aware that other suitable material.

fiat spring F which is curved as shown and illustrates a modification.

Frame or support A carries binding posts a a, post at having electrical connection with bracket 13 and post at having electrical connectionwith mineral cup I). Mounted on bracket B is thumb screw B integral with which is pin 6. Post E supports bracket'e which is a bearing for a pin J which is suit-- ably connected to the mineral cup D; the nnneral being preferably silicon although it might be carborundum, copper pyrite or Pin d engages a suitably connected to the frame at f. kt f a steed rod f issoldered, or otherwise suitably connected, to the spring F; the rod being bent to engage a slotted arm f projecting-from the balance wheel G which is rotatably mounted on bearing G". Rigidly connected to wheel G is a pointer G in adjacency to a gage G having suitable indi cating marks thereon.

The operator turns the thumb screw until he is satisfied by repeated trial that the aforesa1d desired contact conditions between the pin 5' and cup D, which give the most etlicient results, have been attained.

The

movement of the thumb screw moves the 1 cup and, through the intermediacy of rod cl,

the spring, which in turn rotates the wheel and moves the pointer along the gage. He may find that when the pointer is at mark 3 on the gage the action is most eilicientfor conditions at that time. It will very likely happen that mechanical shaking or the jarring due to the sending of messages from, for example, a companion instrument or the heavy. discharge of static, or from various other causes, will change the condition of en agement between pinb' and cup I); but

in my apparatus, in such; case, all that the operator needs' do is to turn the thumb screw to restore the pointer to its position opposite mark 3. It will be observed that a slight movement of pin (Z will give a large movement to the bent end of rod 7, and this movement will be again multiplied on account of the length of the pointer so that a very slight change in the condition of engagement of pin Z) and cup D will not only be registered but will be registered with the greatest accuracy with reference to the gage.

In Fig. 4 the cup H is stationary and the spring H carries a nut 11 to varythe engagement between pin H and cup H; the condition of engagement being indicated by pointer H in adjacency to gage H, in this instance, directly, the thumb screw H carrying pin H and moving the nut H It will be clear that my invention is useful not only for wireless telegraphy and wireless telephony but also for a number of other purposes; but it is of special value in wireless apparatus.

lVhat I claim is:

1. A detectometer comprising an adjusther; a spring member having bne end fixed and one end free and being engaged relatively near its fixed end by said cup member; a balance wheel rotated by the free end of said spring; a gage; a pointer rigidly connected to said wheel and having its free end moving in adjacency to said gage, the distance from the free end of the pointer to the axis of said wheel being very great relatively to the distance from the axis of the wheel to the point of engagement of the wheel and spring. 7

3. A wireless system detectometer comprising a plurality of elements which when disposed in an exactly determined contact Copies of this patent may be obtained for relationship with respect to each other, normally establish operative conditions in said system most favorable to the operation thereof, one of said elementscomprising a rectifying mineral and another of said elements beinga member adapted to exert a compressive effort upon said mineral, movable means for establishing said relationship, and means subject to the action of said movable means, for indicating how much movement of the latter is required to restore said relationship when the same has been disestablished, said indicating means including mechanism for amplifying a displacement of one of said elements resulting from the compressive efi'ort exerted upon said rectifying mineral, said displaced elementhaving a connection with said amplifying mechanism, which connection is normally under a compressive stress corresponding to said compressive effort. 4

l. A wireless system detectometer comprising a plurality of elements Which when I disposed in an exactly determined contact relationship with respect to each other, normally establish operative conditions in said system most favorable to the operation thereof one of said elements comprising a rectifying mineral and another of said elements being a member adapted to exert a compressive effort upon said mineral, movable means for establishing said relationship, and means, subject to the action of said movable means, for indicating how much movement of the latter is required to restore said relationship when the same has been disestablished, said indicating means including mechanism for amplifying a displacementof one of said elements resulting from the compressive ellort exerted upon said rectifying mineral, said displaced element having a connection with said ampiifying mechanism, which connection is normally under a stress corresponding to said compressive efl'ort.

ARTHUR Gr.v CARLSON. Vitnesses GEORGE A. ROCKWELL, AGNES M. SHEA.

five cents each. by addressing the Commissioner of Iatents, Washington, D. G. 

